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    Apparatus for controlling a fuel system of an internal combustion engine
    1.
    发明授权
    Apparatus for controlling a fuel system of an internal combustion engine 失效
    用于控制内燃机的燃料系统的装置

    公开(公告)号：US5937826A

    公开(公告)日：1999-08-17

    申请号：US33338

    申请日：1998-03-02

    申请人： David Olson ,  Keith L. Musser ,  Stephen West ,  Shyamala Raghunathan ,  Jonathan A. Stavnheim

    发明人： David Olson ,  Keith L. Musser ,  Stephen West ,  Shyamala Raghunathan ,  Jonathan A. Stavnheim

    IPC分类号： F02M41/00 ,  F02D41/22 ,  F02D41/40 ,  F02M41/02 ,  F02M59/36 ,  F02M63/00 ,  F02M7/00

    CPC分类号： F02M59/366 ,  F02D41/221 ,  F02D41/3845 ,  F02D41/406 ,  F02M41/02 ,  F02D2041/227 ,  F02M2200/40 ,  Y02T10/44

    摘要： A fuel system includes an electronically controllable high pressure fuel pump operable to supply high pressure fuel from a lower pressure fuel source to a high pressure fuel collection chamber having a pressure sensor associated therewith. The fuel collection chamber feeds an electronically controllable valve operable to dispense the high pressure fuel to a fuel distribution unit supplying fuel to a number of fuel injectors. A control computer is provided for controlling the high pressure fuel pump and valve in response to requested fueling, engine speed and fuel pressure provided by the pressure sensor. The control computer is normally operable to drive the fuel pump as a function of fuel pressure and a reference pressure, which is based on requested fueling, and to control the valve as a function of commanded fueling, which is a function of engine speed and a reference speed based on requested fueling, and fuel pressure. In a first limp home mode, the control computer is operable to drive the fuel pump as a function of fuel pressure and commanded fueling if abnormal operation of the high pressure fuel pump is detected. In this mode, the valve is controlled only as a function of fuel pressure. In a second limp home mode, the control computer is operable to drive the fuel pump with a predicted fuel pump command based on the fuel command and engine speed, if abnormal operation of the pressure sensor is detected. In this mode, the valve is controlled as a function of the fuel command and the reference pressure or a default pressure.

    摘要翻译： 燃料系统包括电子可控的高压燃料泵，其可操作以将来自低压燃料源的高压燃料供应到具有与其相关联的压力传感器的高压燃料收集室。 燃料收集室供应电子可控阀，可操作以将高压燃料分配到向多个燃料喷射器供应燃料的燃料分配单元。 提供控制计算机，用于响应于由压力传感器提供的所需的加油，发动机转速和燃料压力来控制高压燃料泵和阀。 控制计算机通常可操作地驱动作为燃料压力和参考压力的函数的燃料泵，其基于所要求的加燃料，并且根据作为发动机转速的函数来控制阀作为指令的加油功能， 基于所需加油的参考速度和燃料压力。 在第一跛行家庭模式中，如果检测到高压燃料泵的异常操作，则控制计算机可操作地作为燃料压力的函数驱动燃料泵和指令的燃料。 在这种模式下，阀门仅作为燃油压力的控制。 在第二跛行模式中，如果检测到压力传感器的异常操作，则控制计算机可操作以基于燃料命令和发动机速度的预测燃料泵命令驱动燃料泵。 在此模式下，根据燃油指令和参考压力或默认压力来控制阀门。